Vince,
I've done this a bit with different sizes and makes of circle hooks vis a vis halibut release studies. I would suggest you start by calling and talking to technicians at some of the hook manufacturers. Find their 800 numbers and spend a morning or two. They talk about "pull stength" which is the force required for the hook to start to deform. While manufacturers will give you a range for pull strength, a lot of the strength depends on the particular wire used during a run, as well as the annealing (?) process. While you may find some answers, the more you know, the less you will be able to clearly give a single number for any single hook.

And they have a cool machine that slowly increases pull until the hook deforms. Were goggles !